An analysis of a new access control technique for channel request in wireless communications

Medium access control protocols are at the core of many wireless communication systems with shared channel resources. Recent proposed MAC protocols tend to divide bandwidth into 2 parts. The first part is used to contend among all users for channel reservation and the second part used for actual data transmission for users who succeed in reservation. From the significant role of the first part, the access probability used by all users for determining whether or not to access the request slot for channel reservation, is an important factor effecting on the system performance. Therefore, this paper presents a full analysis for deriving a new optimal access technique that an optimal access probability used in the system is selected in accordance with the present system condition taking the number of users and number of request slots into consideration. The results from our analysis show that in the system which each user has only a single access per frame the new technique outperforms all conventional techniques in all tested traffic and system environments